Fix: hide refnav if external user

htdocs/soc.php

@@ -986,7 +986,7 @@ else
 	// Name
 	print '<tr><td width="20%">'.$langs->trans('Name').'</td>';
 	print '<td colspan="3">';
-	print $form->showrefnav($soc,'socid','',1,'rowid','nom');
+	print $form->showrefnav($soc,'socid','',($user->societe_id?0:1),'rowid','nom');
 	print '</td></tr>';
 
 	print '<tr><td>'.$langs->trans('Prefix').'</td><td colspan="3">'.$soc->prefix_comm.'</td></tr>';